Granted Patent
Utility
US 4,521,040 · App. 06/419,270
Combined metal and elastomer seal
Inventors:
Richard W. Slyker, John Pettit
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Sep 17, 1982
Inventors
Richard W. Slyker
John Pettit
Assignee (at issue)
Vetco Offshort, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.